Siemens SIMOTION D4x5-2 Commissioning And Hardware Installation Manual page 153

Setting the send cycle clock in HW Config
The send cycle clock for PROFINET IO must be set in the "Domain Management" dialog in
HW Config. To do this, select the "Edit" > "PROFINET IO" > "Domain management ..." menu
command in HW Config and set the desired cycle clock.
The PROFINET interface can be operated with a send cycle clock in the range of 0.25 ms ≤
send cycle clock ≤ 4 ms when one servo is used. The smallest configurable time base is 0.125
ms.
Note
Information for version < V4.4
If there are IO devices with RT class "RT" in a sync domain, it is only possible to set the send
cycle clocks 0.25 ms, 0.5 ms, 1 ms, 2 ms and 4 ms.
Cycle clock reduction ratio
As of V4.3, a reduction ratio for the PROFIBUS cycle clock to the Servo cycle clock is possible.
The reduction ratio is only permitted when PROFINET IO with IRT has not been configured.
A reduction ratio for the PROFINET send cycle clock to the PROFIBUS cycle clock is also
possible.
Example:
PROFINET send cycle clock = 0.5 ms
PROFIBUS cycle clock = servo cycle clock = 1 ms
The PROFIBUS cycle clock can be operated relative to the PROFINET send cycle clock at a
ratio of 1:1 to 16:1.
The table below shows the possible ratio settings for the SIMOTION D4x5‑2 system cycle
clocks based on the DP cycle of the SINAMICS Integrated or PROFINET send cycle clock.
Table 6-6
Cycle clock name
PROFIBUS DP
bus cycle clock
Servo
IPO
IPO_2
Always "1" if PROFINET with IRT has been configured
1)
Setting the cycle clock ratios
The set bus cycle clock is displayed in SIMOTION SCOUT as the "Bus data cycle" in the
"System Cycle Clocks - D4x5‑2" dialog box. Select SIMOTION D4x5‑2 and then select the
"Set system cycle clocks" command from the "Target system" > "Expert" menu.
Set the required cycle clock ratios for the servo, IPO and IPO_2 in the "System Cycle Clocks
- D4x5‑2" dialog box.
SIMOTION D4x5-2
Commissioning and Hardware Installation Manual, 03/2018, A5E33441636B
Ratios of the system cycle clock (when one servo is used)
Settable factors
1, 2, 3, 4, 6, 8, 10, 12, 14, 16
As of V4.3: 1, 2, 3, 4, 8
V4.2: 1
1, 2, 3, 4, 5, 6
2, 3, 4, 5, ..., 64
Parameter assignment / addressing
6.5 Configuring PROFINET IO
Reference cycle clock
PROFINET IO send cycle clock
PROFIBUS DP bus cycle clock
1)
Servo
IPO
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